Added doc for variant querying

code_samples/api/product_catalog/src/Command/ProductVariantCommand.php

@@ -99,6 +99,10 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         );
         $redVariants = $this->productService->findVariants($colorQuery);
 
+        foreach ($redVariants->getVariants() as $variant) {
+            $output->writeln($variant->getName());
+        }
+
         return self::SUCCESS;
     }
 }